Door motor device



Feb. 25, 1939.

P. R; FORMAN noon MOTOR DEVICE Filed Aug. 6, 1926 3 Sheets-Sheet l INVENTOR- 0//6 7? F7: rrnarz 9 i AIZ'ORNE 5 Feb. 25, 1930. P. R. FORMAN DOOR MOTOR DEVICE Filed Aug. 6. 1926 3 Sheets-Sheet INVENTOR 76 5/75 7? Farmer 9 1 hisATTORNEY Feb. 25, 1930. P. R. FORMAN DOOR MOTOR DEVICE Filed Aug. 6. 1926 5 Sheets-Sheet llkmll LII .lllLlllllrllnll rvrmn i J ts BY 5am ea w his ATTO absorbin th 310 H v closed.position.

"pevide'swit areaeompletely o en' aienteJ Feb. 25,- 1930 JPARIS R. FORMAZN; or Emily; N comPAm, oE-'N:Ew'Yoax m,Y; 4

EW JERSEY, ASSI eivoia. To NArnIoNAL PNEUMATIC CORPORATION or. wEsm VIRGINIA.

.DeoR-mr B- n-, 1

a ame fi Ad u i 6 This. invention relates an improved form- 01E. o .eigating motor" for deorsali'dfthelike' j This inventio relatesto; an eleotrio motorf Y whi'ehi's, adaptedfto. operate doors in ip assage- .5 Waysmnd i mp me'en efor; reducingthe' Speed tii motor to a's'pe d n ta e r the operation of doors and the like; l

, -This ZlIlVBHtlGl lifillIfthQIf relatesrto means 01:

e strain of shocked the i-gears' when the. doors reach their fully opened 1 or f This invention further comprises Ihjeans op rate y e mevem nt o h mot r to i m -tl e ll pening v r.f 15. clo ing fthi A, furth obi tv of ie ih n o i to shes operated by th moveme t' oi thedhor driving mechanism which will ls'will be used. i the 5 several, views to i JdiCat-Q h Same qr; Similar x-palrtsl i i I i I I Fig, 1 repr en el'atp n viaaa ih ction,f taken. onja horizontal p'la'ne,', Show mg he f a ures -ofmy-inv nt on: ,Fig. 2 represents: an endlyiew ice,, w th the w t h easingi nicres Fig-f is a s e 'lev t on'a ew switch ca sing cov'er removed; a

e. p articula Ohi ea s soug 'andi btai'nei by this "inventi ncomprise theutili'zation er V a;reyolving eleotrie motor for operating dhore in passageways-, especially of t e, type eompr 'si'ngf tWQ r more, iilige eq bns m unted on f revelvabl'e sh ft? AS. a particupplicat on. of this. mo or device',,, refer: enc' i s maderto my, ppli a n Serial l2fi8 filedfl lgi sfi 32 926; r.

i-ltie ei'cenree evid .tythat-ordineryeleef ae ss ctieni with. he

no elvgea r operation,

, prevent toogreat a s h during the decelerating operation. is also 1 i order'to signal an attenda gear e7,'fwhich iileshes 925; serila'inoeiarem. a

trical'motors' revolve a 7 g a fan t e r ady adapt' t n to the use of per tinglen ent to that Suitable for door J Since the parts must be brought toa rest at the end of the door opening or V closing operation, I havefound' it necessary to provide suitable shock absorbing meanst'o" train. on the gear train the d iven e evidentthat some means must be proyi cled" forjbre akihg the feed c irrentto the 'olriving motor. when theldo'ors'are completely open 55, or closed; and Ihave therefore provided a suitable switching arrangement to beoper ated. by (the; movement of the geartrain. In nt where desirable when the doors are-open or closed, I have also providedfa' novel switohi'ngde i'ce' for operating 'sui table signals for this purpose. a 7

All o fithisstruoture-has been combined in a- .small, eompaet device which may bereadily supported over the door jainb withoutr'equirin'g verymuch space.

tor the draw Referring V ings, the electric motor is indicated at 1, attached by any suitable meane toithe easing 2,iwhichhas atrane VQ 'S IY-Qiitendingwall 3 therein." One end 3 ofthe casingfis'open, ahdjs provided with a removable eover 4, an'd'the Wholetstructure is v suitably supported by means of'feet or racket Themotor shaftffihaskeyed theretoa mitre withthe 'mitre gear 8, w ch, t r s m unt d 0 thegsmall 'spur'gear 9. j'lhe large gear wheel ei dreamy m ans fi l p gear 9, a a t c ed; integ'r lt erew t "another p gear-111i which d'ri'vesjt helarge gear Wheel 12. The gear 12'. is mounted forr'otatioir'withthe pu 'geer vWhiifli dri e th large gear he l" 1 at eehe o th s a Th r shaft 16" mounted infthe easing '2, Iproyideev 95 a rotatable support forthe 'mitreg'ear7 and. Pur1 e -9, e thelg e si 2' d' which a e fre ly rm m edfo his Sh Gem'- 10 ahd' 11, Qwhibh" ota te together, are freely mounted; on the rshe t & speed'w h tdo Y doors'andi the'lllike- I havethere v for pr v ed in a, e y compe i r ay rgrotation with 5., ne-em re 9 a V shaft 18 is tapered to receive the crank arm 19, which is intended to be attached to the door operating shafts in the usual and wellknown manner.

The other end of the shaft 17 is square in cross-section, and has "securely mounted thereon the insulating drum 21 which pro-' vides a support for the conducting metallic strip 22. Two sets of fingers 23 and 24, supported on the block of insulating material 25, are arranged adjacent the strip22, so that when the drum 21 is in suitable position, the fingers of either group are bridged thereby. Also supported within the casing is the block of insulating material 25', on whichare mounted the metallic studs26 and 28, which support respectively the rocker switch arms 27 and 29. Studs 26. and 28 are also supported on the insulating block 25, and form the other terminal of a circuit against which the arms 27 and 29 may be forced by means of the springs 34 and 33 respectively, Supported on the square portion of the shaft 17 and between the casing 3 and drum 21, is a collar 30, which has formed integrally therewith the projecting arm 31. A threaded-adjustable pin 32 is secured to the outer end of the arm 31, and is adapted to contact with either rocker arm 27 or 29, to cause their free ends to move out of contact with the terminals 28 or 26 respectively, depending upon the position of the arm 31. It will be noted that this arm is adapted to be rotated through 180. f

A short extension is bolted to the gear 14 (Fig. 1), and is adapted to engage with the small piston rod 42, on which is mounted the piston 41, adapted to move within the cyl-v inder 40. This dash-pot construction is intended to aid in the deceleration of the gears as the door approaches the end of its opening or closing-stroke. V

The screw-threaded block provides a suitable opening through which grease may be introduced to the casing so: that the gear train may operate smoothly. 51 represents the point of entry for the wires to the switch box.

The operation of this device is readily parent from the foregoing description, but it may be gone over briefly at this time]; The

' motor 1 operates the crank arm 19 throughthe gear train, as is apparent from Fig. 1. The

crank arm 19.need only rotate through. 180

tocomplete thedoor opening or closing operation, and a considerable reduction in speed is therefore necessary where an electric motor of the revolving type is used. At the end of the opening and closing stroke,the projection 15 engages with the piston rod 42 of the dash-pot, which aids in deceleratingthe moving parts without'subjecting them to a sudden shock. Suitable electric circuits may be connected to the setsof contact fingers. 23 and 24 to provide visible or audible signaling devices to indicate when the doors are open or closed. To protect the electric motor, the

switches 27 and 29 are connected in the feed circuit thereto, so that when the door is completely open or closed, the arm 31 will operate the switches 27 or 29, depending upon its position, to move them out of contact with theterminals 26 or 28, respectively, to deenergize' the motor.

11am, of-course, aware that many. changes ters Patent, is s v 1. In a motor structure for door actuation, the combination with an electricmotor, of a speed reducing gear train,'one of the gears in said train having a projection thereon, a resilient pneumatic stop adapted to engage said projection to prevent jamming of the gears, and a crank driven by said gears adapted at its outer end ,to actuate doors, together with a drum switch and a drum switch arm adapted to rotate with said gear train.

2. In a motor structure, the combination with an electric motor of a speed reducing gear train, one of the gears in said train having a stop thereon and a dash-potadapted to be engaged by said stop when rotated in either direction to prevent-injury to the gear train, together with means carried by said gear train for door opening and closing, and switch means carried also by said gear train for ultimately controlling in a predetermined fashion said first means by controlling said 'FIAOO by said gear trainand interposed in the electrical circuit of said motor together with further switch means for signalling thecondition of the first switch means. i 4; In a device of the class described, fo

operating doors and the like, the combina- ,Y

tion with a casing and a motor securedthereto, of a train of gears therein connected to said motor, and a drum switch operated by the movement of said gears for closing a signaling circuit, together with an arm adapted to exert pressure on a plurality of spring th doors are nearly opened or closed, and

closed switches to open said switches against v v said springs for controlling said motor when.

" "said doors are fullyopen or closed.

5. In a device ofthe class described, for op-, erating doors and the "like, the combination with a casing and a motor secured thereto,

' of a train of gears therein'connected to said motor, a drum switch, operated by saidgears I to signal the position of the doors, and means for resiliently retarding'the gear train when further means operated through an arm carmotor.

' 6 In a device ofthe ried by saidgear. train for controlling said class described, for operatingdoors and the like, the combinaz tion with a casing and a motor secured thereto, of a train of gears thereinconnected to said motor, a drum switch'and an arm op- I switches operated-by said gears to break the motor closed.

circuit when the doors are opened or 10. In a device of the class described for"? I the doors are fullyopened or closed, an arm carried by said gear train, spring closed switches adapted for actuation by said arm to open the circuit ofsaid motor when the doors are fully opened or closed;

In testimony whereof I have hereunto set I my hand on this 28th day of July, A. D1926. 1

. PARIS R. FORMAN.

erated by said gears and a plurality of j switches connected in the circuit to saidmotor and adapted to be operated by said arm n I to break the motor circuit when the doors are at the end of their movement,while said 'drumswitch operated by said train of gears operates to signal when the doors are at the end of their movement.

7. In a device of the class described, for operating. doors and the like, the combination with a casing and a motor secured thereto, of a train of gears therein connected to said motor,an arm attached to the shaft driven by said gears, switches adapted to normally remain closed, and to be opened by said arm at the endof its stroke, and a drum switch operated by said gears and adapted to close a signalcircuit to indicate the position of the doors, together with a crank arm operated by said train adapted at its outer end to actuate doors.

8. Inadevice of the class described, for

operating doors, thecombination of a casing and a motor supported thereby, of a train of gears journaled in said casing and driven by s said motor, a crank arm driven by said gears to be connectedto the doors, and dash pot I means in said casing and cooperating with e i said gears for cushioning the gear train at the time the doors are fully opened 'or closed, together with means foropenmgthe circuit to said motor andfurther means for signalling such door condition when the doors are fullyrop'ened or closed. v '9.v In a device of the class described, for operating doors, the combination of a casing and a motor supported thereby, of a train of gears journaled in said casing and driven by Y saidmotor, a crank armidriven by said gears to be connected to the doors, means in said casing'an'd cooperating with said gears for cushioning the gear train at the time the '.doors are fully opened or closed, a. drum switch operated by said gears to control a signal to indicate when the doors are open or closed, and a plurality of normally closed 

